What is Semen Sibling?
1.
When you discover that one of your parents has had sex with the parents of someone you know, that person is now your semen sibling.
I kept wondering why dad keeps on giving rachel wierd looks, turns out he fucked her mother and we're semen siblings.
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Random Words:
1.
The codename for the female genitalia
check out that muffasaurus!!!
Whoa! Watch out for that muffasaurus!
See muff, pussy, vagina, fe..